Method of producing cast surfaces and product obtained thereby





2. A MASONRY BLOCK HAVING AN INTEGRAL MOLDED FACING LAYER OF A COMPOSITION COMPRISING THE REACTION PRODUCT OF AN ETHYLENICALLY UNSATURATED ALKYD RESIN AND A POLYMERIZABLE VINYL MONOMER AND SAND AS A FILLER, THE LATTER BEING IN AN AMOUNT OF AT LEAST ABOUT 50% AND NOT OVER 90% OF THE TOTAL OF THE RESIN, MONOMER AND FILLER BY WEIGHT, THE COMPOSITION OF SAID FACING LAYER PERMEATING THE ADJACENT SURFACE OF SAID BLOCK, SAID COMPOSITION BEING CURED TO PERMANENTLY INTERLOCK SAID FACING LAYER AND BLOCK AND TO FORM A FACING LAYER HAVING A HARD, ABRASION RESISTANT SURFACE SUBSTANTIALLY FREE OF PITS AND PINHOLES AND PROSSESSING ELASTICITY ENABLING THE LAYER TO BE RESISTANT TO PEELING, CRAZING, STAINING AND CRACKING DUE TO BLOWS AND TO DIFFERENCES IN COEFFICIENTS OF EXPANSION AND CONTRACTION BETWEEN THE SAID BLOCK AND THE SAID FACING THEREON, SAID SAND PARTICLES AND SAID REACTION PRODUCT BEING BONDED TO ONE ANOTHER BY A BONDING AGENT COMPRISING AN ALKYLENE SUBSTITUTED SILANE, AND WHEREIN THE POLYMERIZABLE VINYL MONOMER ALSO COMPRISES A BLEND OF TRICRESYL PHOSPHATE WITH A MEMBER SELECTED FROM THE CLASS CONSISTING OF DIMETHYL ITACONATE AND ETHYL ACRYLATE. 